Introduction
Animal welfare issues are inherent in any intensive production system that restricts animals to an environment incompatible with their behavioural needs (D’Eath & Turner, 2009). For example, intensive husbandry practices, such as a mix of pigs in a confined space, can result in significant stress reactions and displays of aggressive behaviour through frustration or restriction of natural behaviour (Guy et al., 2009; Yonezawa et al., 2009). This paper will discuss the use of pig-appeasing pheromone (PAP) to reduce aggression and social stress generally, and the importance of tail posture in predicting incidents of tail-biting injury in post-weaning piglets.
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